Assets for off-road track creation

[Endriex]

Most likely yes and yes.
To select those objects you need to click on the bottom of them for technical reasons. It's strongly recommended to manually input coordinates for the objects via F3. If you can't orientate yourself in the scene then look at the objects from above.

Hum... That's strange. It's working but not properly. Look at SS:
http://i.imgur.com/KukRp5j.jpg